“Sometimes I doubt and sometimes I believe. And I like not making myself believe when I am doubting, and not making myself doubt when I am believing. Surely neither God nor Accident need my consistency.”

As quoted in The Martians of Science : Five Physicists Who Changed the Twentieth Century (2006) by István Hargittai, p. 251

As quoted in Gérard de Villiers (1975), The Imperial Shah: An Informal Biography, page 273
Attributed

Source: Holidays on Ice

Reporters and editors luncheon address (2007)

The Freethinker (1970), G.W. Foote & Company, Volume 90, p. 147.
Date unknown

Source: The Rebel (1951), pp. 8 - 10 as quoted in Albert Camus and the Philosophy of the Absurd';(2002) by Avi Sagi, p. 44
Context: The absurd … is an experience to be lived through, a point of departure, the equivalent, in existence of Descartes' methodical doubt. Absurdism, like methodical doubt, has wiped the slate clean. It leaves us in a blind alley. But, like methodical doubt, it can, by returning upon itself, open up a new field of investigation, and in the process of reasoning then pursues the same course. I proclaim that I believe in nothing and that everything is absurd, but I cannot doubt the validity of my proclamation and I must at least believe in my protest. The first and only evidence that is supplied me, within the terms of the absurdist experience, is rebellion … Rebellion is born of the spectacle of irrationality, confronted with an unjust and incomprehensible condition.

Source: Anna Karenina Notes